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Yeadon K, Lai EPC, Song N, Huang X. Cyclic Voltammetry for Accurate Icing Detection on Simulated Aircraft Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38013389 DOI: 10.1021/acs.langmuir.3c01928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Icing and ice accretion on aerodynamically critical surfaces of an aircraft increase drag, reduce lift, and raise stalling speed, which pose significant safety hazards to aircraft while in flight. Icephobic coatings have been intensively investigated by the Canadian and global aerospace industries for passive ice protection. Nevertheless, effective icephobic coatings suitable for aerospace applications are far from ideal. Ice protection of an aircraft still relies on active ice protection systems based on heating, mechanical expulsion, and deicing fluids, which are heavy-weight, power-intensive, and unfriendly to the environment. To address these challenges, rapid and accurate detection of icing is highly desirable to activate these ice protection systems only when needed. To this end, cyclic voltammetry was used for the first time to detect the initiation of icing on aircraft surfaces with or without icephobic coatings. In this study, a water droplet was sandwiched between a screen-printed electrode and a simulated aircraft surface. Cyclic voltammograms were then collected as the temperature was slowly decreased until the droplet froze to form ice. A sharp spike in faradaic current was recorded in the voltammograms during the phase transition, suggesting a switch in the mass transfer mechanism from diffusion to a surface-confined pathway. This electrochemical signal could then be used to precisely indicate the onset of icing. The developed sensing method shows potential in icing detection to manage active ice protections and ameliorate icing risks in the aerospace and aviation industries.
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Affiliation(s)
- Kate Yeadon
- Department of Chemistry, Carleton University, Ottawa, Ontario K1S 5B6, Canada
| | - Edward P C Lai
- Department of Chemistry, Carleton University, Ottawa, Ontario K1S 5B6, Canada
| | - Naiheng Song
- Aerospace Research Centre, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Xiao Huang
- Department of Mechanical and Aerospace Engineering, Carleton University, Ottawa, Ontario K1S 5B6, Canada
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Kim J, Park S, Yang H. Wash-free photoelectrochemical DNA detection based on photoredox catalysis combined with electroreduction and light blocking by magnetic microparticles. Talanta 2023; 253:123872. [PMID: 36113336 DOI: 10.1016/j.talanta.2022.123872] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 08/22/2022] [Indexed: 12/13/2022]
Abstract
To obtain a sensitive, wash-free photoelectrochemical biosensor based on electron mediation between an electrode and a photoredox catalyst (PC) label, unavoidable O2-related reactions should have no effect or be beneficial, and the rate of electron mediation should depend on the distance between the PC label and electrode. A wash-free photoelectrochemical biosensor that (i) combines photoredox catalysis of a PC label with electrochemical reduction of an electron mediator, and (ii) uses a light-blocking multilayer of magnetic microparticles was developed. O2 participates as an electron acceptor in photoredox catalysis; thus, increasing rather than decreasing the electrochemical signal. Upon photoirradiation from the opposite side of a transparent indium tin oxide (ITO) electrode in contact with the solution, the light intensity in the solution is sharply decreased by the light-blocking multilayer, which increases the contribution of affinity-bound PC labels on the ITO electrode to the electrochemical signal compared to that of unbound PC labels in solution. Utilizing eosin Y (EY2-) and Fe(CN)64- as the PC and electron mediator (i.e., electron donor), respectively, enabled rapid redox cycling based on photoredox catalysis combined with electroreduction. The cathodic charge is mainly related to electron transfer from Fe(CN)64- to excited EY2- (Type I photosensitization), rather than energy transfer from excited EY2- to O2, which generates 1O2 (Type II photosensitization). The developed detection scheme was applied to wash-free detection of a model target DNA. Detection limits of ∼200 pM were obtained in both phosphate-buffered saline and serum without washing. The developed scheme enables simple photoelectrochemical detection.
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Affiliation(s)
- Jihyeon Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Seonhwa Park
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea
| | - Haesik Yang
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea.
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Longinotti MP, Corti HR. Diffusion of ferrocene methanol in super-cooled aqueous solutions using cylindrical microelectrodes. Electrochem commun 2007. [DOI: 10.1016/j.elecom.2007.02.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Szadkowska A, Wrona PK, Galus Z. Electrochemical behaviour of mixtures of phenazine with iodine in the solid state. J PHYS ORG CHEM 2003. [DOI: 10.1002/poc.657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kulesza PJ, Dickinson, Williams ME, Hendrickson SM, Malik MA, Miecznikowski K, Murray RW. Electron Self-Exchange Dynamics of Hexacyanoferrate in Redox Polyether Hybrid Molten Salts Containing Polyether-Tailed Counterions. J Phys Chem B 2001. [DOI: 10.1021/jp004339j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pawel J. Kulesza
- Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
| | - Dickinson
- Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
| | - Mary Elizabeth Williams
- Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
| | - Susan M. Hendrickson
- Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
| | - Marcin A. Malik
- Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
| | - Krzysztof Miecznikowski
- Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
| | - Royce W. Murray
- Kenan Laboratories of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, and Department of Chemistry, University of Warsaw, Pasteura 1, PL-02-093 Warsaw, Poland
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Gonçalves AM, Mathieu C, Herlem M, Etcheberry A. Using Pt microelectrodes in liquid ammonia for studying proton reduction. J Electroanal Chem (Lausanne) 1999. [DOI: 10.1016/s0022-0728(99)00398-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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